ATI Radeon X1950 Pro: CrossFire Done Right
by Derek Wilson on October 17, 2006 6:22 AM EST- Posted in
- GPUs
The Test
We are using the same Intel Core 2 Extreme X6800 setup for this article that we've been using over the past couple months. Driver revisions haven't changed since our 7950 GT article, and we will be looking at the same three resolutions: 1280x1024, 1600x1200 and 1920x1440. Here's the breakdown of the hardware used:
| CPU: | Intel Core 2 Extreme X6800 (2.93GHz/4MB) |
| Motherboard: |
Intel D975XBX (LGA-775) ASUS P5NSLI |
| Chipset: |
Intel 975X NVIDIA nForce 570 SLI |
| Chipset Drivers: |
Intel 7.2.2.1007 (Intel) NVIDIA nForce 8.22 |
| Hard Disk: | Seagate 7200.7 160GB SATA |
| Memory: | Corsair XMS2 DDR2-800 4-4-4-12 (1GB x 2) |
| Video Card: | Various |
| Video Drivers: |
ATI Catalyst 6.9 NVIDIA ForceWare 91.47 |
| Desktop Resolution: | 1920 x 1440 - 32-bit @ 60Hz |
| OS: | Windows XP Professional SP2 |
We will also be testing with the same seven games we've employed for the past few reviews. Next month will see an exciting change in our benchmarking lineup as we are preparing new games for the bench right now. Expect to see the latest Battlefield, Splinter Cell, and Company of Heroes make their way into our test suite in the near future. For now, sit back, relax, and enjoy the soothing experience that is benchmark analysis.
There is quite a bit of data in each of these tests, so we'll focus on the sweet-spot performance analysis and leave the rest of the data more for reference than anything else.
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DerekWilson - Tuesday, October 17, 2006 - link
First of all, every site uses their own benchmarking techniques and sequences in the games. Numbers between review sites won't be comparable.For Quake 4 we used ultraquality mode, and this seems to give ATI the advantage over NVIDIA. We don't have a problem with this because we would prefer to tip the scales in favor of the product that can deliver the best performance at the highest image quality.
munky - Tuesday, October 17, 2006 - link
Would you rather Ati continued to ship the x1900gt with the original specs, and then a bunch of the cards would have to be RMA'd?DerekWilson - Tuesday, October 17, 2006 - link
We would rather they just run out of x1900 GT cards. They're discontinuing the line anyways, so it seems a little strange to try to increase supply by underhanded means.sri2000 - Tuesday, October 17, 2006 - link
They should ship it under a different model number. Call is the X1900 GTA or something like that (or some other alphabet soup combo that's not already taken) so that people can tell that the different model# = different performance.Goty - Tuesday, October 17, 2006 - link
You guys are ragging on this CF implementation like it's some sub-par solution. The transfer speed may be lower than that used by NVIDIA's SLI bridge, but SLI is simplex while this implementation is full duplex. Being able to send data in both directions at the same time should provide a huge speed boost while using ATi's SuperAA modes.JarredWalton - Tuesday, October 17, 2006 - link
Scalability is the key factory. In most benchmarks, SLI gets more of an improvement than CrossFire, indicating that the compositing engine is not an optimal multi-GPU solution. There's almost certainly a decent amount of overhead involved. We do like the new CF connector, but the proof is in the pudding. If 7900 GS is clearly slower in single card configs but often faster in dual-GPU configs, clearly SLI is scaling better than CF.mesyn191 - Friday, October 20, 2006 - link
I don't think its possible to comment on the new CF at all, they've clearly got screwed up drivers for it ATM, but then its ATi so what else is new...I hope AMD cleans up thier driver team because still even after all these years ATi does a half assed job on its drivers.
Goty - Tuesday, October 17, 2006 - link
Are you guys thinking of doing any testing with any of either vendor's multi-card AA modes any time soon? I really think the full duplex connection would really help there (i.e. the cards may not scale as well with the number of cards, but what about as the image quality increases?)Rza79 - Tuesday, October 17, 2006 - link
The Tech Report had problems with this motherboard and Crossfire which made them switch to the Asus P5W DH.You aren't expiriencing any problems with this board?
Second thing, why no AA with games like B&W2 and FEAR?
DerekWilson - Tuesday, October 17, 2006 - link
No problems with the motherboard.AA performance under Black and White 2 and FEAR were excluded because we decided framerate was already at a minimum for the resolution we were testing.